The invention is an electric toothbrush, which comprises an electric body, a brush head piece and a stone removing hook.The electric body comprises an installation base and a vibration device connected with each other.The brush head and stone removing hook can be installed on the mounting base and can be disassembled. After installation, they can be driven to vibrate by the mounting base, and they can be installed at the same time.The brush head piece comprises a plurality of bristles.The stone removing hook consists of a hard material with a tip at the end.By means of the vibration device of the electric body, the installation seat can drive the brush head part or the stone removing hook to vibrate. The user can first scrape the plaque or the tooth stone with the stone removing hook, and then brush the teeth with the brush head part, so as to clean the teeth more completely.As an invention to eliminate the formation of dental calculus, the invention can surpass the cleaning effect of traditional half a year's tooth washing, and achieve the effect that calculus never has.本創作係電動牙刷，其包含一電動本體、一刷頭件、及一除石鉤。電動本體包含相互連接的一裝設座及一震動裝置。刷頭件與除石鉤皆可安裝於裝設座且能拆卸，安裝後能被裝設座帶動震動，且兩者於同一時間點擇一裝設。刷頭件包含複數刷毛。除石鉤包含一硬性材質且末端為尖端的鉤部。藉由電動本體的震動裝置使裝設座帶動刷頭件或除石鉤震動，使用者能先以除石鉤刮除牙菌斑或牙結石再以刷頭件刷牙，藉此更完整地清潔牙齒。本創作為杜絕牙結石形成之發明，能超越傳統半年洗牙一次的清潔效果，達到牙石永無之功效。
